S.A. Kapustin – Post-graduate Student,

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

A.V. Lvutin – Post-graduate Student,

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

Yu.V. Raevskaya – Ph.D. (Eng.), Associate Professor,  

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

А.А. Titarenko – Dr.Sc. (Eng.), Professor,  

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

E-mail: physics@nntu.nnov.ru; Kapustin_1994@mail.ru